Telophase
This is the final stage of mitosis in which the mitotic spindle disappears and each polar chromosomal group is reconstituted into a daughter nucleus, A nucleus membrane develops around each chromosomal group from endoplasmic reticulum. Soon , the cell itself divides into two daughter cells, The chromosomes start thinning and lengthening by decondensation () unlooping , uncoiling , and unfolding , ), ultimately becoming 10 nm chromatin fibres and forming the chromatin reticulum, their heterochromatic regions , however remain folded in 30 nm thick solenoids . Nucleoli also form around the nucleolar organizer sites of specific chromatin fibres.